from datetime import datetime


def generate_unique_resource_name(resource_prefix):
    """Generates a unique resource name by appending a time
    string after the specified prefix.

    :param str resource_prefix: The resource prefix to use.
    :return: A string with the format "resource_prefix-<time>".
    :rtype: str
    """
    return resource_prefix + "-" + datetime.utcnow().strftime("%Y%m%d-%H%M%S")